CN104513928A - Broad hot strip steel production method for vanadium-containing middle-level petroleum and natural gas conveying tube - Google Patents
Broad hot strip steel production method for vanadium-containing middle-level petroleum and natural gas conveying tube Download PDFInfo
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- CN104513928A CN104513928A CN201410819255.0A CN201410819255A CN104513928A CN 104513928 A CN104513928 A CN 104513928A CN 201410819255 A CN201410819255 A CN 201410819255A CN 104513928 A CN104513928 A CN 104513928A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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Abstract
The invention discloses a broad hot strip steel production method for a vanadium-containing middle-level petroleum and natural gas conveying tube. The broad hot strip steel production method comprises the following steps: extracting vanadium by using a 150 ton converter, smelting in the 150 ton converter, conducting LF refining, conducting slab continuous casting, heating, descaling by using high-pressure water, conducting controlled-rolling, conducting controlled-rolling cooling, and coiling, wherein the micro alloy element vanadium is added into the chemical components of broad hot strip steel. The micro alloy element vanadium is added to replace the imported niobium element, and the ratio of the phases is controlled with the combination of a controlled rolling and controlled cooling process and a low-temperature high-pressing technique, so that a company has an autonomous right in raw material use and price, the quality of a plate blank is improved, the production difficulty and the production cost are reduced, and the requirements of middle-level petroleum tube line steel on the mechanical property, the microstructure and other comprehensive properties are met.
Description
Technical field
The present invention relates to metallurgical technology field, especially a kind of containing rank petroleum gas delivering pipe broad hot strip production method in vanadium.
Background technology
Pipe line steel refers to hot-rolled sheet, band steel for the manufacture of oil, natural-gas transfer pipeline and container, and 2013, China produced hot-rolled coil product 18270.7 ten thousand tons, and wherein pipe line steel output surpasses 1,000 ten thousand tons, in the national economic development, occupy significant role.And along with constantly carrying out of national West-East National Gas Transmission Project, the demand as the matching used middle low level pipe line steel of rectilinear duct will progressively expand.
Current domestic iron and steel enterprises produces X42M, X46M, X52M, X56M level pipeline pipeline steel (hereinafter referred to as middle level pipeline pipeline steel), by ensureing to be reached mechanics, grain fineness number, banded structure, impact, the survey requirement intensity such as to drop hammer, generally adopt and add niobium, or niobium adds titanium micro-alloyed complex intensifying system, but China is niobium natural resources shortage country, its main place of production is Brazil, Australia, the countries such as Canada, especially Brazil's metallurgy and mining industry company limited control the niobium production in the world 85%, the price fixing of niobium certainly will be caused, and then cause that to lose take niobium as the right of speech of raw produce price, under one's control to a certain extent, simultaneously according to current many experts, the large quantity research of scholar, find niobium having the greatest impact to the high-temperature ductility of steel, think that niobium has deepened inductile temperature curve, make inductile humidity province larger, temperature is lower, thus cause and the most easily produce mass defect containing niobium slab, the existence of transverse crack, not only increase slab degradation and learies, more seriously can cause steel plate edge tissue abnormalities, compactness is poor, impelling strength and intensity reduce, therefore very harsh production measure need be formulated for preventing containing niobium steel surface transverse cracks, the production difficulty of slab and the rising of cost certainly will be added.Even some iron and steel enterprise adopts the way in excision bight to solve containing niobium slab corner crack problem, while causing a large amount of financial loss, delay the production time greatly, the delivery date simultaneously brought extends, take the indirect loss such as stock, manpower and be difficult to especially estimate.
China's vanadium resource is very abundant, no matter be resources reserve, or vanadium output is all positioned at No. 1 in the world, the guarantee of raw material resources, this just ensure that the price containing vanadium product has sufficient autonomy to a certain extent, especially along with deepening continuously of studying vanadium, and the invention application of the technology such as vanadium micro-alloying, grain refining, controlled rolling and controlled cooling, the large pressure of low temperature, deformation induced trans-formation, provide technical support for producing containing rank petroleum gas delivering pipe broad hot strip in vanadium.
Summary of the invention
The invention provides a kind of containing rank petroleum gas delivering pipe broad hot strip production method in vanadium, add microalloy element vanadium and replace import niobium element, and coordinate cooling controlling and rolling controlling process and the large Reduction Technology of low temperature to control the ratio of each phase, not only make use at raw material and have full decision-making power in price, improve slab quality, reduce production difficulty and production cost, and mechanical property, microtexture and other over-all properties in realizing required by level pipeline pipeline steel.
The technical solution used in the present invention is:
A kind of containing rank petroleum gas delivering pipe broad hot strip production method in vanadium, comprise the steps: that 150 tons of vanadium extraction by converter blowing → 150 ton converter smelting → LF refining → sheet billet continuous casting → heating → high-pressure water descaling → controlled rolling → controlled rolling cools → batches;
Described controlled rolling comprises roughing rolling → Coil Box → finish rolling rolling.
The chemical composition of broad hot strip increases microalloy element vanadium, and the mass percent of the composition of varying strength rank broad hot strip is:
The mass percent of X42M composition is: C 0.08 ~ 0.10%, Si≤0.25%, Mn 0.65 ~ 0.75%, P≤0.018%, S≤0.008%, V 0.020 ~ 0.030%, ALs 0.015 ~ 0.035%;
The mass percent of X46M composition is: C 0.08 ~ 0.10%, Si≤0.25%, Mn 0.85 ~ 0.95%, P≤0.018%, S≤0.008%, V 0.040 ~ 0.050%, ALs 0.015 ~ 0.035%;
The mass percent of X52M composition is: C 0.08 ~ 0.10%, Si≤0.25%, Mn 1.05 ~ 1.15%, P≤0.015%, S≤0.005%, V 0.060 ~ 0.070%, ALs 0.015 ~ 0.035%;
The mass percent of X56M composition is: C 0.08 ~ 0.10%, Si≤0.25%, Mn 1.25 ~ 1.35%, P≤0.015%, S≤0.005%, V 0.080 ~ 0.090%, ALs 0.015 ~ 0.035%.
Described coiling temperature is 540 ~ 580 DEG C.
Described steel billet start rolling temperature is 1180 ~ 1220 DEG C.
Described exit temperature at finishing is 820 ~ 850 DEG C.
Three passage total reduction >=30% after described.
Composition Design of the present invention: the chemical composition of middle level pipeline pipeline steel is exactly at conventional strengthening element C, on the basis of Mn, according to varying strength rank, increase different micro-conjunction elemental vanadium, the effect adding vanadium is by forming V (C, N) structure and properties of steel is affected, mainly Precipitation in the ferrite of austenite grain boundary, can austenitic recrystallize be suppressed and stop grain growth in the operation of rolling, thus play fining ferrite grains, improve intensity and the toughness of steel, meet the anti-Charpy impact required by pipe line steel simultaneously, drop weight tearing performance, and required by the grain size number that reaches.
Rolling technology: adopt controlled rolling and controlled cooling and the large Reduction Technology of low temperature, when controlling to ensure that strand heats heat-up time, vanadium is uniformly distributed, during rolling, steel billet start rolling temperature is by 1180 ~ 1220 DEG C of scope controls, exit temperature at finishing is by 820 ~ 850 DEG C of scope controls, and rear three passage total reduction >=30%, coiling temperature is by 540 ~ 580 DEG C of scope controls, ensure that crystal boundary separates out tiny controlled carbide, nitride and carbonitride, play pinning effect and stop grain growth, finally realize refined crystalline strengthening, solution strengthening and precipitation hardening effect thus obtain desirable microtexture and excellent mechanical property.
The present invention is according to vanadium strengthening mechanism and rolling strengthening mechanism:
1) vanadium strengthening mechanism:
Vanadium is the excessive race metallic element being positioned at periodic table of elements period 4 VB race, strong carbide and nitride forming element, have low etc. refined crystalline strengthening and high precipitation hardening effect, vanadium mainly exists with vanadium nitride, vanadium carbide and vanadium carbide nitride and solid solution vanadium form in steel.The strengthening and toughening mechanism of of Vanadium Microalloyed Plate Steels mainly leans on grain refining, precipitation hardening and solution strengthening to realize.
2) rolling strengthening mechanism:
Rolling technology causes the change of intensity to be mainly reflected in the change of grain fineness number and the change of phase volume per-cent.Grain refining both can improve intensity also can improve toughness, can obtain the performance of obdurability excellence, generally often improves grain fineness number 1 grade and can improve intensity 15 ~ 35MPa.Perlite is the tissue that intensity is higher, and ferrite is that plasticity and toughness are organized preferably, and in the heterogeneous structure of ferrite and pearlite, the perlite volumn concentration often improving 1% can improve intensity 5MPa.Adopt controlled rolling and controlled cooling technique limits start rolling temperature and final rolling temperature is to obtain required heterogeneous structure, after adopting the large Reduction Technology of low temperature to ensure finish rolling, three reduction in pass >=30% can impel ferrite deformation induced trans-formation, and increase dislocation desity and crystal grain thinning improve intensity.Therefore effectively can realize the control to grain fineness number and Phase Proportion by controlled rolling and controlled cooling and the large Reduction Technology of low temperature, thus realize the control to intensity.
Feature of the present invention only adds micro-alloy vanadium element on the basis of conventional strengthening element carbon, manganese, and coordinate cooling controlling and rolling controlling process and the large Reduction Technology of low temperature to change carbide, nitride or Carbonitride Precipitation amount, size etc. to control the ratio of each phase, form, size and distribution, increase solid solution and precipitation hardening and refined crystalline strengthening effect, thus mechanical property, microtexture and all other over-all propertieies in realizing required by each trade mark of level pipeline pipeline steel.
What adopt the present invention to produce contains each trade mark pipe line steel of rank in vanadium, owing to only adding the microalloy element vanadium of China's abundance, current each producer is replaced generally to use import niobium element, make use at raw material and have full decision-making power in price, simultaneously because v element characteristic in steel greatly reduces the crack sensitivity of slab, improve slab quality, reduce production difficulty, and production cost.
The beneficial effect adopting technique scheme to produce is:
The present invention adds microalloy element vanadium and replaces import niobium element, and coordinate cooling controlling and rolling controlling process and the large Reduction Technology of low temperature to control the ratio of each phase, not only make use at raw material and have full decision-making power in price, improve slab quality, reduce production difficulty and production cost, and mechanical property, microtexture and other over-all properties in realizing required by level pipeline pipeline steel.
Embodiment
Accumulative about 100,000 tons of each trade mark pipe line steel of rank in thickness 3.75 to the 17.5mm, width 1000 to the 1620mm that adopt the present invention to produce, and all delivered downstream user uses after processing tubulation, all other performances such as its mechanical property, microstructure shock resistance, anti-drop weight tearing performance all meet relevant criterion and user's service requirements.
Embodiment 1
X42M pipe line steel:
The mass percent of each composition is: 0.09%C, 0.20%Si, 0.70%Mn, 0.025%V, 0.005%S, 0.016%P, 0.022%ALs, produce through 150 tons of vanadium extraction by converter blowing, 150 tons of converter smeltings, LF refining, sheet billet continuous casting, heating, high-pressure water descaling, controlled rolling (roughing rolling → Coil Box → finish rolling rolling), controlled rolling cooling, coiling processes.During rolling, steel billet start rolling temperature is 1180 DEG C, and exit temperature at finishing is 840 DEG C, and after finish rolling, three passage total reductions are 32% [rainforest wood wind 1], and coiling temperature is 540 DEG C, obtains X42M pipe line steel.
Embodiment 2
X46M pipe line steel:
The mass percent of each composition is: 0.09%C, 0.18%Si, 0.89%Mn, 0.045%V, 0.005%S, 0.013%P, 0.020%ALs, produce through 150 tons of vanadium extraction by converter blowing, 150 tons of converter smeltings, LF refining, sheet billet continuous casting, heating, high-pressure water descaling, controlled rolling (roughing rolling → Coil Box → finish rolling rolling), controlled rolling cooling, coiling processes.During rolling, steel billet start rolling temperature is 1200 DEG C, and exit temperature at finishing is 830 DEG C, and after finish rolling, three passage total reductions are 35%, and coiling temperature is 580 DEG C, obtains X46M pipe line steel.
Embodiment 3
X52M pipe line steel:
The mass percent of each composition is: 0.09%C, 0.17%Si, 1.09%Mn, 0.065%V, 0.004%S, 0.014%P, 0.024%ALs, produce through 150 tons of vanadium extraction by converter blowing, 150 tons of converter smeltings, LF refining, sheet billet continuous casting, heating, high-pressure water descaling, controlled rolling (roughing rolling → Coil Box → finish rolling rolling), controlled rolling cooling, coiling processes.During rolling, steel billet start rolling temperature is 1190 DEG C, and exit temperature at finishing is 820 DEG C, and after finish rolling, three passage total reductions are 36%, and coiling temperature is 560 DEG C, obtains X52M pipe line steel.
Embodiment 4
X56M pipe line steel:
The mass percent of each composition is: 0.09%C, 0.15%Si, 1.30%Mn, 0.085%V, 0.005%S, 0.012%P, 0.021%ALs, produce through 150 tons of vanadium extraction by converter blowing, 150 tons of converter smeltings, LF refining, sheet billet continuous casting, heating, high-pressure water descaling, controlled rolling (roughing rolling → Coil Box → finish rolling rolling), controlled rolling cooling, coiling processes.During rolling, steel billet start rolling temperature is 1220 DEG C, and exit temperature at finishing is 850 DEG C, and after finish rolling, three passage total reductions are 39%, and coiling temperature is 550 DEG C, obtains X56M pipe line steel.
[rainforest wood wind 2]
X42M pipe line steel: the mass percent of each composition is: 0.08%C, 0.15%Si, 0.65%Mn, 0.020%V, 0.004%S, 0.016%P, 0.015%ALs, and production method is with embodiment 1.
Embodiment 6
X42M pipe line steel: the mass percent of each composition is: 0.10%C, 0.25%Si, 0.75%Mn, 0.030%V, 0.008%S, 0.012%P, 0.035%ALs, and production method is with embodiment 1.
Embodiment 7
X46M pipe line steel: the mass percent of each composition is: 0.08%C, 0.05%Si, 0.85%Mn, 0.040%V, 0.006%S, 0.018%P, 0.015%ALs, and production method is with embodiment 2.
Embodiment 8
X46M pipe line steel: the mass percent of each composition is: 0.10%C, 0.25%Si, 0.95%Mn, 0.050%V, 0.008%S, 0.012%P, 0.035%ALs, and production method is with embodiment 2.
Embodiment 9
X52M pipe line steel: the mass percent of each composition is: 0.08%C, 0.10%Si, 1.05%Mn, 0.060%V, 0.003%S, 0.015%P, 0.015%ALs, and production method is with embodiment 3.
Embodiment 10
X52M pipe line steel: the mass percent of each composition is: 0.10%C, 0.25%Si, 1.15%Mn, 0.070%V, 0.005%S, 0.011%P, 0.035%ALs, and production method is with embodiment 3.
Embodiment 11
X56M pipe line steel: the mass percent of each composition is: 0.08%C, 0.10%Si, 1.25%Mn, 0.080%V, 0.003%S, 0.015%P, 0.015%ALs, and production method is with embodiment 4.
Embodiment 12
X56M pipe line steel: the mass percent of each composition is: 0.10%C, 0.20%Si, 1.35%Mn, 0.090%V, 0.004%S, 0.013%P, 0.035%ALs, and production method is with embodiment 4.
Carry out Performance Detection to the pipe line steel of embodiment 1-4 respectively, detected result is as follows:
The performance detection data of embodiment 1 is as table 1-1,1-2,1-3:
Table 1-1 embodiment 1 X42M level pipeline pipeline steel mechanical property
Table 1-2 embodiment 1 X42M level pipeline pipeline steel microscopic structure
Table 1-3 embodiment 1 X42M level pipeline pipeline steel Charpy impact and Drop-Weight Tear Test (DWTT)
The performance detection data of embodiment 2 is as table 2-1,2-2,2-3:
Table 2-1 embodiment 1 X46M level pipeline pipeline steel mechanical property
Table 2-2 embodiment 1 X46M level pipeline pipeline steel microscopic structure
Table 2-3 embodiment 1 X46M level pipeline pipeline steel Charpy impact and Drop-Weight Tear Test (DWTT)
The performance detection data of embodiment 3 is as table 3-1,3-2,3-3:
Table 3-1 embodiment 1 X52M level pipeline pipeline steel mechanical property
Table 3-2 embodiment 1 X52M level pipeline pipeline steel microscopic structure
Table 3-3 embodiment 1 X52M level pipeline pipeline steel Charpy impact and Drop-Weight Tear Test (DWTT)
The performance detection data of embodiment 4 is as table 4-1,4-2,4-3:
Table 4-1 embodiment 1 X56M level pipeline pipeline steel mechanical property
Table 4-2 embodiment 1 X56M level pipeline pipeline steel microscopic structure
Table 4-3 embodiment 1 X56M level pipeline pipeline steel Charpy impact and Drop-Weight Tear Test (DWTT)
。
Claims (5)
1., containing a rank petroleum gas delivering pipe broad hot strip production method in vanadium, it is characterized in that comprising the steps: that 150 tons of vanadium extraction by converter blowing → 150 ton converter smelting → LF refining → sheet billet continuous casting → heating → high-pressure water descaling → controlled rolling → controlled rolling cools → batches;
Described controlled rolling comprises roughing rolling → Coil Box → finish rolling rolling;
The chemical composition of described broad hot strip increases microalloy element vanadium, and the mass percent of the composition of varying strength rank broad hot strip is:
The mass percent of X42M composition is: C 0.08 ~ 0.10%, Si≤0.25%, Mn 0.65 ~ 0.75%, P≤0.018%, S≤0.008%, V 0.020 ~ 0.030%, ALs 0.015 ~ 0.035%;
The mass percent of X46M composition is: C 0.08 ~ 0.10%, Si≤0.25%, Mn 0.85 ~ 0.95%, P≤0.018%, S≤0.008%, V 0.040 ~ 0.050%, ALs 0.015 ~ 0.035%;
The mass percent of X52M composition is: C 0.08 ~ 0.10%, Si≤0.25%, Mn 1.05 ~ 1.15%, P≤0.015%, S≤0.005%, V 0.060 ~ 0.070%, ALs 0.015 ~ 0.035%;
The mass percent of X56M composition is: C 0.08 ~ 0.10%, Si≤0.25%, Mn 1.25 ~ 1.35%, P≤0.015%, S≤0.005%, V 0.080 ~ 0.090%, ALs 0.015 ~ 0.035%.
2. according to claim 1 containing rank petroleum gas delivering pipe broad hot strip production method in vanadium, it is characterized in that described coiling temperature is 540 ~ 580 DEG C.
3. according to claim 1 containing rank petroleum gas delivering pipe broad hot strip production method in vanadium, it is characterized in that described steel billet start rolling temperature is 1180 ~ 1220 DEG C.
4. according to claim 1 containing rank petroleum gas delivering pipe broad hot strip production method in vanadium, it is characterized in that described exit temperature at finishing is 820 ~ 850 DEG C.
5. according to claim 1 containing rank petroleum gas delivering pipe broad hot strip production method in vanadium, it is characterized in that described rear three passage total reduction >=30%.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105385947A (en) * | 2015-11-26 | 2016-03-09 | 河北钢铁股份有限公司承德分公司 | Steel for vanadium-microalloying 600 MPa high-strength packing belt and production method |
| CN105861799A (en) * | 2016-05-31 | 2016-08-17 | 攀钢集团攀枝花钢铁研究院有限公司 | Thick vanadium-containing pipeline steel and production method thereof |
| CN106048442A (en) * | 2016-05-31 | 2016-10-26 | 攀钢集团攀枝花钢铁研究院有限公司 | Vanadium-containing pipeline steel and production method thereof |
| CN106566989A (en) * | 2016-11-01 | 2017-04-19 | 河钢股份有限公司承德分公司 | Hot rolling wide strip steel for vanadium-containing tool and production method for hot rolling wide strip steel |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102978307A (en) * | 2012-11-29 | 2013-03-20 | 德龙钢铁有限公司 | Process for reducing production of pipeline steel |
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2014
- 2014-12-25 CN CN201410819255.0A patent/CN104513928A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102978307A (en) * | 2012-11-29 | 2013-03-20 | 德龙钢铁有限公司 | Process for reducing production of pipeline steel |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105385947A (en) * | 2015-11-26 | 2016-03-09 | 河北钢铁股份有限公司承德分公司 | Steel for vanadium-microalloying 600 MPa high-strength packing belt and production method |
| CN105861799A (en) * | 2016-05-31 | 2016-08-17 | 攀钢集团攀枝花钢铁研究院有限公司 | Thick vanadium-containing pipeline steel and production method thereof |
| CN106048442A (en) * | 2016-05-31 | 2016-10-26 | 攀钢集团攀枝花钢铁研究院有限公司 | Vanadium-containing pipeline steel and production method thereof |
| CN106048442B (en) * | 2016-05-31 | 2018-05-01 | 攀钢集团攀枝花钢铁研究院有限公司 | Pipe line steel containing vanadium and its production method |
| CN106566989A (en) * | 2016-11-01 | 2017-04-19 | 河钢股份有限公司承德分公司 | Hot rolling wide strip steel for vanadium-containing tool and production method for hot rolling wide strip steel |
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Application publication date: 20150415 |